摘要
针对81511综采工作面辅助进风巷爆破切顶卸压沿空留巷的围岩变形难题,采用现场实测与系统分析相结合的方法,明确了留巷围岩变形规律及底鼓的主导影响因素,进而提出了“双排高强急增阻锚索+顶底双梁”底鼓控制对策。研究表明:留巷变形以底鼓和煤柱帮鼓为主要形式,顶板整体保持平整,仅挡矸侧存在垮落矸石挤压导致的帮鼓现象;底板岩层承载能力薄弱,在煤柱帮垂直应力作用下易发生压曲、离层与膨胀变形,这是底鼓加剧的关键诱因,而煤柱帮附近的底板区域是变形控制的核心部位;“双排高强急增阻锚索+顶底双梁”联合控制技术通过增强煤柱帮附近底板的刚度与强度,可将采动应力有效转移至挡矸侧采空区,进而实现对留巷围岩的有效控制,底鼓量较控制前减小58.4%,成功解决了留巷变形难题,为类似工况下沿空留巷的稳定控制提供了可靠的技术支撑。
Aiming at the surrounding rock deformation problem of the blasting roof-cutting pressure-relief gob-side entry retaining in the auxiliary air intake roadway of 81511 fully mechanized working face,combining on-site measurement and systematic analysis,the deformation pattern of the retained entry's surrounding rock and the dominant influencing factors of floor heave were systematically identified,and the"double-row high-strength rapid resistance-increasing anchor cables+roof-floor double beams"floor heave control measures were then proposed.Research showed that:the main forms of deformation in the retained entry were floor heave and coal pillar rib heave;the roof remained generally flat,with only rib heave occurring on the gangue retaining side due to the extrusion of collapsed gangue;the floor rock stratum had weak bearing capacity and was prone to buckling,delamination and expansion deformation under the vertical stress of the coal pillar rib,which was the key inducement for the aggravation of floor heave,and the floor area near the coal pillar rib was the core part for deformation control;the"double-row high-strength rapid resistance-increasing anchor cables+roof-floor double beams"joint control technology can effectively transfer the mining-induced stress to the goaf on the gangue retaining side by enhancing the stiffness and strength of the floor near the coal pillar rib,thereby realizing effective control of the retained entry's surrounding rock;after control,the floor heave amount was reduced by 58.4%compared with that before control,successfully solving the retained entry deformation problem and providing reliable technical support for the stable control of gob-side entry retaining under similar working conditions.
作者
王永健
张雪峰
刘听
杨晓成
石家旭
郝兵元
WANG Yongjian;ZHANG Xuefeng;LIU Ting;YANG Xiaocheng;SHI Jiaxu;HAO Bingyuan(Production Technology Department,New Energy Co.,Ltd.,Shanxi Huayang Group,Yangquan 045000,Shanxi,China;No.2 Coal Mine,New Energy Co.,Ltd.,Shanxi Huayang Group,Yangquan 045000,Shanxi,China;General Institute of Industrial Technology,Huayang New Material Technology Group,Yangquan 045000,Shanxi,China;Beijing Jiaotong University,Beijing 100091,China;Taiyuan University of Technology,Taiyuan 030024,Shanxi,China)
出处
《能源与节能》
2025年第12期55-59,共5页
Energy and Energy Conservation
关键词
切顶留巷
围岩变形
底鼓控制技术
roof-cutting gob-side entry retaining
surrounding rock deformation
floor heave control technology
